Warming of Atlantic Water in two west Spitsbergen fjords over the last century (1912–2009)

Polar research

Stig Falk-Petersen¹  Boris V. Ivanov²  Frank Nilsen⁷  Alexey K. Pavlov⁸  Mats A. Granskog⁹  Vigdis Tverberg^1,10 

[1] Department of Oceanology, St. Petersburg State University, RU-198178 St. Petersburg, Russia;Faculty of Biosciences and AquacultureUniversity of Nordland, NO-8049 Bodø, Norway;Faculty of BiosciencesFisheries and Economics, University of Tromsø, NO-9037 Tromsø, Norway;Geophysical InstituteUniversity of Bergen, NO-5020 Bergen, Norway;Norwegian Polar Institute Fram Centre, NO-9296 Tromsø, Norway;Akvaplan-niva Fram Centre, NO-9296 Tromsø, Norway;Arctic and Antarctic Research Institute RU-199397 St. Petersburg, Russia;Arctic and Antarctic Research Institute RU-199397 St. Petersburg, RussiaCorrespondence;Department of Arctic GeophysicsUniversity Centre in Svalbard, NO-9171 Longyearbyen, Norway;Norwegian Polar Institute Fram Centre, NO-9296 Tromsø, Norway

关键词: Temperature;    West Spitsbergen Current;    Atlantic Water;    ERA reanalysis;    warming;    Svalbard;   

DOI  :  10.3402/polar.v32i0.11206

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

The recently observed warming of west Spitsbergen fjords has led to anomalous sea-ice conditions and has implications for the marine ecosystem. We investigated long-term trends of maximum temperature of Atlantic Water (AW) in two west Spitsbergen fjords. The data set is composed of more than 400 oceanographic stations for Isfjorden and Grønfjorden (78.1°N), spanning from 1876 to 2009. Trends throughout the last century (1912–2009) indicate an increase of 1.9°C and 2.1°C in the maximum temperature during autumn for Isfjorden and Grønfjorden, respectively. A recent warming event in the beginning of the 21st century is found to be more than 1°C higher than the second warmest period in the time series. Mean sea-level pressure (MSLP) data from ERA-40 and ERA-Interim data sets produced by the European Centre for Medium-Range Weather Forecasts and mean temperature in the core of the West Spitsbergen Current (WSC) at the Sørkapp Section along 76.3°N were used to explain the variability of the maximum temperature....

【 授权许可】

CC BY-NC